Die-stock.



E. A. OAKES.

DIE STOQK.

APPLICATION FILED JAN-13,!9l4,

1,154,424. Patented Sept. 21, 1915.

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EA. Gaffes col-ULEIA PLANQGRAPH CO.,\VA5HINGTON, D. C.

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v ERNEST A. CAKES, 0F SEYMOUR,- CONNECTICUT.

DIE-STOCK.

Specification of Letters Patent.

Patented Sept. 21, 1915.

Application filed January 13, 1914. Serial No. 811,846.

in its make-up an annular body provided with one or more handles and is adapted to hold interiorly thereof'several chasers. In use this annular body with the inclosed chasers, receives within it the'work'and by turning the body the chasersform on the work, a thread. After the thread is made there Will be found on the work burs or protrusions between the chasers and the latter being rigidly mounted are frequently seriously injured and at times irreparable damage is done to their cutting edges by To eliminate this disadvantage I provide for retra'ctive or backing-off movement of the chasers, so that when the improved tool has performed its ofiice of cutting a thread, it can be readily and easily taken from place without possibility of the burs mentioned affecting in any wise the cutting edges of the chasers or of the chasers injuring the formed thread.

The invention comprises other features of novelty and advantage which with the foregoing will be stated at length in the following description wherein I will set forth in full. that one of the several forms of embodiment of the invention which I have selected for illustration in the drawings accompanying and formingpart of the present specification. From this it will be clear that I do not restrict myself to such showing; I may depart therefrom in material respectswithin the scope of the invention'defined by the claims following said description.

Referring to said drawings: Figure 1 is a top plan view of a die-stock involving my invention. Fig. 2 is av side elevation partly in section of said die stock, the section being on the line 2-2 of Fig. 1. Fig. Bis a section on the line 33 of Fig. l, and, Fig. 4 is a section on the line 4-4 of Fig. 3.

Like characters refer to like parts throughout the several figures, which it will be noted are on different scales.

My die stock comprises'in its make-up a suitable body, that designated by 2 answering satisfactorily in this connection, being annular and thus conforming in its general shape to those now in common use. The body 2 has circumferential complemental sockets 3'to removably receive the handles 4 which provides a simple way of revolving or rotating the body or head 2; this in fact is the customary manner of performing this function with existing die-stocks.

There is. carrying means for the chasers and said carrying means'may varyin nature, although the member 5 satisfactorily meets, the desired conditions, said carrier as shown consisting of a circular plate or disk which has a hearing or sliding fit against the circular inner surface 6 in the central opening of the head or b0dy'2. From this it will be clear that the chaser-carrier 5 can be turned in said body 2, and the reason for this will be hereinafter explained. The chaser-carrier 5 as illustrated, is shown equipped with four chasers or as they are some times termed lands 7, but their number is not a matter of consequence nor is their particular shape material, the invention as will be inferred not residing in any particular form of chaser but rather as to one of its features, in a highly advantageous means for effecting backing off movement thereof when occasion requires. As shown the carrier 5 has radial slots 9 corresponding in number with and adapted to receive the respective chasers 7. The outer ends of these slots 9 intersect the cylindrical chambers 10 which open into the periphery of the carrier 5, while the inner ends thereof connect with the central Work-receiving opening 11 of the carrier, mit the. cutting-portions of the chasers 7 to be projected into said. opening and to also permit said cutting portions to act on the periphery of said work. I J r The circular surface 6 to which I have referred, is interrupted at intervals by relief notches 12 which correspond in number with the chasers and which present one of several convenient ways of permitting retractive movement of said chasers, said movementsin the present case being in an outto perward direction. Each of the notches or reliefs 12 has a beveled portion 13 extending from the bottom thereof toward the surface 6, and the purpose of which will hereinafter be-set forth.

In. the chambers 10 are comparatively freely or slidingly mounted what I term plungers 14;, consisting as illustrated of cylindrical sleeves internally threaded to receive the respective bearing and adjusting screws 1.5 against which the base of the re spective chasers 7 constantly abut, each sleeve having diametrically-opposite slots in its inner edge to receive the base portion of its chaser. By running those screws 15 in or out the respective chasers 17 can be adjusted to regulate the depth of out. It will be clear, therefore, independently and readily adjusted. T 0

provide for easy access to them without dismounting anything, I may, as shown, form in the body 2 holes 7 to receive a suitable implement to turn the screws. 15 the slots of which are I opposite the holes 7 when the carrier 5 is in its normal position. The plungers or sleeves 1 are circumferentially cut away as at 16 which leaves abutments as 17 at the inner ends of said plungers. The carrier 5 is transversely perforated as at 18 to receive the pins .19 which are driven into place and which extend transversely through the cut away portions or keyways 16. These pins constitute suitable stops for the respective plunger-s or sleeves 1 L, being so positioned as not to prevent the movement necessary to effect retraction of the chasers 7 as Will hereinafter appear, but they do prevent accidental displacement or falling out of the chasers by the abutments or catch portions 17 engaging the same. These pins, however, do not prevent free movement when necessary of the plungers 14L. The carrier 5 has segmental apertures 20 to receive springs as 21 which have bearing engagement respectively against the inner arcuate walls of said apertures 20, the springs between their ends extending through notches 22 in the respective chasers 7. Normally or when the chasers 7 are in their advanced or inner positions at which time the plungers 14 are out of the relief'notches 12 and against the solid part of the surface '6, these springs 21 will be bowed and will thus exert a constant tendency to retract the chasers 7 or move them and the plungers 14 connected therewith in a radial'outward direction. This particular movement is prevented as long as the ,plungers 14 are against the uncut part of the surface 6.

It will be assumed that the outer ends of the plungers 14: are against the uncut part of the wall 6, and in this event as will be clear the chasers 7 will be in their advanced positions. To effect retraction of the chasers that the chasers can be,

I opening.

it is necessary to turn the carrier and 'entially from the projecting hub 24: of said carrier. The hub 2st has a guide opening 24' for the work and its inner circular wall merges into the beveled interior surface 5 of the carrier, thereby presenting a chip-receiving chamber.

The parts are shown as occupying their normal or working positions in Fig. 1 the handle 23 at this time being in longitudinal alinemcnt with the adjacent socket 3 and handle 4. To effect backward movement of the vchasers the following procedure may be adopted. The handle will be grasped and swung in the direction of :the arroiv which moves the carrier therewith and shifts the chasers 7 and plunger-s 14; laterally to carry the plungers into contact with the beveled faces 13 along which they are moved by the springs 21, this action continuing until the p'lungers are against the bottoms of the reliefs '12 at which point the chasers will have been fully retracted to thus permit the tool being removed from the work-without possibility of the work or the chasers affecting the work. To return the chasers to their operative relations the handle will be returned to the position it is shown as occupying in 1.

It will be noted that the carrier .5 with injuring the chasers I the nut fitting an annular rabbet 28 in said V The nut is provided with inwardly extending cars 29, the carrier 5 having practically similar outwardly .-extending ears '30. It will be understood that when the ears 29 overlie the ears 30 the nut is holding the carrier in place. By. turning the carrier sufficiently to bring its lugs oi ears SO opposite the spaces between the lugs or ears 29, said carrier with its chaser-s can be easily lifted from place for any desired purose.

The head or body 2 is provided with suitas ble means for driving the chaser carrier 5, and although said means may vary as to character that shown and now to be described is quite satisfactory. The external head 13 of one of the sockets 3 (that to the right in Figs. 1 and 2) is notched to produce the shoulder 23 to en a e a ainst the shoulder or driving face 23 acting against said lever 23 constituting a rigid part of the carrier will cause the latter to turn in the same direction in which said head or body is turned.

\V hat I claim is;

1. A die-stock comprising a body, a carrier in the body having a central opening and also having chambers opening into the periphery of the carrier, plungers in said chambers, and adjusting screws threaded into said plungers, chasers abutting against the adjusting screws, extending through the carrier into the central opening thereof, the body having reliefs to receive said plungers on a predetermined movement of the carrier, said carrier being turnable in the body whereby the plungers can be moved opposite the reliefs, the body having holes to obtain access to said screws.

2. A die stock comprising a body, a carrier mounted in the body for turning movement, chasers supported by the carrier for movement radially of the body, and springs acting between their ends against the respective chasers, the carrier having apertures to receive the springs, and said springs bearing against the walls of the respective apertures opposite their points of thrust against the respective chasers and tending constantly to move said chasers outwardly, the body having reliefs to receive the chasers when the carrier has been turned a certain distance.

3. A die stock comprising a body, a rock ing carrier in the body, chasers supported by the carrier for gnovement radially of the body, plungers slidingly supported by the carrier, means for preventing rotation of the plungers, and screws tapped into said plungers, for adjusting the respective chasers, the body having reliefs to receive said plungers when the carrier has been turned to a certain position in the body.

4. A die stock comprising a body, a rock ing carrier in the body, chasers supported by the carrier for movement radially of the body, plungers slidingly supported by the carrier, means for preventing rotation of the plungers, and screws tapped into said plungers, for adjusting the respective chasers, the body having-reliefs to receive said plungers when the carrier has been turned to a certain position in the body,

said body also having openings through it to obtain access to the respective screws.

5. A die stock comprising a body, a rocking carrier in the body, chasers supported by the carrier for adjusting movement toward and from the center of the carrier, means acting against the respective chasers and tending constantly to force them outwardly, the body having reliefs to permit retraction of the chasers when the carrier has been turned in the body a certain distance, and an adjustable support for each chaser mounted on said carrier and movable therewith.

6. A die stock comprising a body, a carrier in the body, chasers adjustably supported by the carrier, and a device for looking the carrier in place in the body and movable on the body without being separated therefrom, to release the carrier and permit the latter being disconnected from the body.

7. A die stock comprising a body, a car rier in the body, chasers adjustably supported by the carrier, and a locking ring fitted in the body having lugs, and intervening spaces, the carrier also having lugs and intervening spaces, the locking ring when its lugs overlie those of the carrier being adapted to hold said carrier in place and said locking ring being turnable in the carrier to move its lugs into registration with the spaces of the carrier to permit the carrier being taken from place Without removing the locking ring.

8. A die stock comprising a body, a carrier mounted in the body for turning movement, and having an opening, chasers supported by the carrier for movement toward and from said opening and independently operative springs acting between their ends against the respective chasers, each spring having bearing engagements against the carrier opposite the point where it bears against its chaser, the springs acting constantly to move thechasers away from said opening and the body having reliefs to receive the chasers when the carrier has been turned a certain distance. I

In testimony whereof I affix my signature in presence of two witnesses.

ERNEST A. OAKES.

Witnesses:

VVILLIAM D. NOLAN, J r., HENRY BENOWITZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

